Hydrofarm AAPA15L 6-Watt 15-LPM Active Aqua Air Pump with 4 Outlets

First off, I was very impressed with the size and weight of the unit, it's hefty and appears to be very well made. 4 air stones in a 5 gallon bucket turns water into a heavy rolling boil, anymore that 4 gallons in a 5gallon bucket will spill over the edge. The output dial works very well and the pump is barely noticeable on any setting outside of full blast. If you're looking for an air pump to brew compost tea, gas off chlorine, or mixing nutes, buy this one, you'll not be disappointed.

This pump provides some pretty impressive air pressure. I have four aquariums. I was using two double outlet pumps. They didn't even come close to the bubble power of this pump. I highly recommend this item.

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pump is about 8 feet from my bed and I cant hear it at all. Puts out alot of air. Used this on a 29 gallon aquarium.

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Excellent air pump for that price. I used it in my Koi pond of 2500 gals. and works great. I am using all 4 ports, but you can also extend for more difussers.

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Over the past 40 years there are few air pumps I haven't tried. I tend to rely on on Luftair and Rena but decided to give these a shot.

Th pumps are huge with great width to them making them a problem for those with limited space. At first the air flow was excellent but it became significantly weaker in a very short period of time. Hydrofarm claims 15 LPM (Litre per minute) but I can assure you this isn't the case. This would mean it out performes the $89 Rena 400 in LPM. I run six of these in deep water tanks and trust me they can't and they don't. 7-9 LPM's would be more appropriate and honest a claim.

The pumps are quiet enough but I suspect as time marches on the noise will increase as is the nature of all air pumps. The way to keep the noise in check and the output at optimum perfomance is to change the air filters every few months. When vibration seems to much the bladder and or baffles need replacing which brings your pumps, regardless of brand back to optimum perfomance levels.

I wish the company included T stops and block offs or the basic minimal add ons most every other air pump is sold with but they don't it's as bare bones as you can get.For large and or deep water tanks these wouldn't be my second let alone my first choice, they'll burn out as would any competitive pump at this level.

But for standard tanks up to 75 gallons and shallow show tanks up to 125 these should do just fine. Because these are new and haven't been running long I can't write about longevity and reliabilty issues but my initial feeling is they will do as well as most any brand and model in their league and at this price point.

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